package no.uib.olsdialog.util;

/////////////////////////////////////////////////////////
//  Bare Bones Browser Launch                          //
//  Version 1.5 (December 10, 2005)                    //
//  By Dem Pilafian                                    //
//  Supports: Mac OS X, GNU/Linux, Unix, Windows XP    //
//  Example Usage:                                     //
//     String url = "http://www.centerkey.com/";       //
//     BareBonesBrowserLaunch.openURL(url);            //
//  Public Domain Software -- Free to Use as You Like  //
/////////////////////////////////////////////////////////

import javax.swing.*;
import java.lang.reflect.Method;

public class BareBonesBrowserLaunch {

    private static final String errMsg = "Error attempting to launch web browser";

    public static void openURL(String url) {

        String osName = System.getProperty("os.name");

        try {
            if (osName.startsWith("Mac OS")) {
                Class fileMgr = Class.forName("com.apple.eio.FileManager");

                Method openURL = fileMgr.getDeclaredMethod("openURL", new Class[]{String.class});

                openURL.invoke(null, new Object[]{url});
            } else if (osName.startsWith("Windows")) {
                Runtime.getRuntime().exec("rundll32 url.dll,FileProtocolHandler " + url);
            } else { //assume Unix or Linux

                String[] browsers = {"firefox", "opera", "konqueror", "epiphany", "mozilla", "netscape"};

                String browser = null;

                for (int count = 0; count < browsers.length && browser == null; count++) {
                    if (Runtime.getRuntime().exec(
                            new String[]{"which", browsers[count]}).waitFor() == 0) {
                        browser = browsers[count];
                    }
                }

                if (browser == null) {
                    JOptionPane.showMessageDialog(null, "Could not find web browser!",
                            "Web Browser Not Found", JOptionPane.ERROR_MESSAGE);
                    Util.writeToErrorLog("Could not find web browser!");
                    throw new Exception("Could not find web browser");
                } else {
                    Runtime.getRuntime().exec(new String[]{browser, url});
                }
            }
        } catch (Exception e) {
            JOptionPane.showMessageDialog(null, errMsg + ":\n" + e.getLocalizedMessage(),
                    "Web Page Not Available", JOptionPane.ERROR_MESSAGE);
            Util.writeToErrorLog("Error when trying to open web page: ");
            e.printStackTrace();
        }
    }
}
